Key features and characteristics. How to choose the right one
Key characteristics and selection criteria for flat-rolled steel:
- Intended use (construction, mechanical engineering, etc.).
- Chemical composition.
- Surface type (uncoated/galvanised). The price of galvanised strip is on average 20% higher.
- Dimensions: width × thickness × length of the strip.
- Tolerances and defects.
- Flatness, straightness (curvature) and cross-sectional shape.
- Mechanical properties (strength, heat resistance, wear resistance).
- Whether or not heat treatment has been carried out. The price of a heat-treated product is higher than that of untreated rolled steel.
An example of a standard designation for metal products:
20×5 steel strip, standard length (a metal strip 20 mm wide, 5 mm thick, of standard length, made from standard-grade structural carbon steel, which, in terms of deoxidation, is either calm – not less than 0.12% (Si) – or semi-calm – 0.07–0.12% (Si)).